Subzero. ARM32. Fixes bugs uncovered by the gcc torture tests.

tests_lit/assembler/arm32/mul.ll

 ; Show that we know how to translate mul.
 
 ; NOTE: We use -O2 to get rid of memory stores.
 
 ; REQUIRES: allow_dump
 
 ; Compile using standalone assembler.
 ; RUN: %p2i --filetype=asm -i %s --target=arm32 --args -O2 \
 ; RUN:   | FileCheck %s --check-prefix=ASM
 
 ; Show bytes in assembled standalone code.
 ; RUN: %p2i --filetype=asm -i %s --target=arm32 --assemble --disassemble \
 ; RUN:   --args -O2 | FileCheck %s --check-prefix=DIS
 
 ; Compile using integrated assembler.
 ; RUN: %p2i --filetype=iasm -i %s --target=arm32 --args -O2 \
 ; RUN:   | FileCheck %s --check-prefix=IASM
 
 ; Show bytes in assembled integrated code.
 ; RUN: %p2i --filetype=iasm -i %s --target=arm32 --assemble --disassemble \
 ; RUN:   --args -O2 | FileCheck %s --check-prefix=DIS
 
 define internal i32 @MulTwoRegs(i32 %a, i32 %b) {
   %v = mul i32 %a, %b
   ret i32 %v
 }
 
 ; ASM-LABEL:MulTwoRegs:
-; ASM-NEXT:.LMulTwoRegs$__0:
-; ASM-NEXT:     mul     r0, r0, r1
+; DIS-LABEL:<MulTwoRegs>:
+; IASM-LABEL:MulTwoRegs:
 
-; DIS-LABEL:00000000 <MulTwoRegs>:
-; DIS-NEXT:   0:        e0000190
-
-; IASM-LABEL:MulTwoRegs:
-; IASM-NEXT:.LMulTwoRegs$__0:
-; IASM-NEXT:    .byte 0x90
-; IASM-NEXT:    .byte 0x1
-; IASM-NEXT:    .byte 0x0
-; IASM-NEXT:    .byte 0xe0
+; ASM:          mul     r0, r0, r1
+; DIS:          e0000190
+; IASM-NOT:     mul
 
 define internal i64 @MulTwoI64Regs(i64 %a, i64 %b) {
   %v = mul i64 %a, %b
   ret i64 %v
 }
 
 ; ASM-LABEL:MulTwoI64Regs:
-; ASM-NEXT:.LMulTwoI64Regs$__0:
-; ASM-NEXT:     mul     r3, r0, r3
+; DIS-LABEL:<MulTwoI64Regs>:
+; IASM-LABEL:MulTwoI64Regs:
+
+; ASM:          mul     r3, r0, r3
 ; ASM-NEXT:     mla     r1, r2, r1, r3
 ; ASM-NEXT:     umull   r0, r2, r0, r2
 ; ASM-NEXT:     # r2 = def.pseudo r0
+; ASM-NEXT:     # r0 = def.pseudo r2
 ; ASM-NEXT:     add     r2, r2, r1
-; ASM-NEXT:     mov     r1, r2
-; ASM-NEXT:     bx      lr
 
+; DIS:          e0030390
+; DIS-NEXT:     e0213192
+; DIS-NEXT:     e0820290
+; DIS-NEXT:     e0822001
 
-; DIS-LABEL:00000010 <MulTwoI64Regs>:
-; DIS-NEXT:  10:        e0030390
-; DIS-NEXT:  14:        e0213192
-; DIS-NEXT:  18:        e0820290
-; DIS-NEXT:  1c:        e0822001
-; DIS-NEXT:  20:        e1a01002
-; DIS-NEXT:  24:        e12fff1e
-
-; IASM-LABEL:MulTwoI64Regs:
-; IASM-NEXT:.LMulTwoI64Regs$__0:
-; IASM-NEXT:    .byte 0x90
-; IASM-NEXT:    .byte 0x3
-; IASM-NEXT:    .byte 0x3
-; IASM-NEXT:    .byte 0xe0
-
-; IASM-NEXT:    .byte 0x92
-; IASM-NEXT:    .byte 0x31
-; IASM-NEXT:    .byte 0x21
-; IASM-NEXT:    .byte 0xe0
-
-; IASM-NEXT:    .byte 0x90
-; IASM-NEXT:    .byte 0x2
-; IASM-NEXT:    .byte 0x82
-; IASM-NEXT:    .byte 0xe0
-
-; IASM-NEXT:    .byte 0x1
-; IASM-NEXT:    .byte 0x20
-; IASM-NEXT:    .byte 0x82
-; IASM-NEXT:    .byte 0xe0
-
-; IASM-NEXT:    .byte 0x2
-; IASM-NEXT:    .byte 0x10
-; IASM-NEXT:    .byte 0xa0
-; IASM-NEXT:    .byte 0xe1
-
-; IASM-NEXT:    .byte 0x1e
-; IASM-NEXT:    .byte 0xff
-; IASM-NEXT:    .byte 0x2f
-; IASM-NEXT:    .byte 0xe1
+; IASM-NOT:     mul
+; IASM-NOT:     mla
+; IASM-NOT:     umull
+; IASM-NOT:     add